Wiktionary
n. 1 (context gymnastics English) A set of apparatus used by female gymnast consisting of two horizontal bars at a small distance apart and set at different heights. 2 (context gymnastics English) A gymnastics event using the uneven bars.
Wikipedia
The uneven bars or asymmetric bars is an artistic gymnastics apparatus. It is used only by female gymnasts. It is made of a steel frame. The bars are made of fiberglass with wood coating, or less commonly wood. The English abbreviation for the event in gymnastics scoring is UB or AB, and the apparatus and event are often referred to simply as "bars". The bars are placed at different heights and widths, allowing the gymnast to jump from bar to bar.
Usage examples of "uneven bars".
She felt that if she had the chance or the desire she might even excel once more on the beam or the uneven bars or the pommel horse.
There were no uneven bars waiting to test her this time, no “.